Record controlled perforating machine



Nov. 17, 1942. V J. w, BRYCE 2,302,002

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Patented Nov. 17, 1942 .UNITED STATES PATENT OFFICE RECORD CONTROLLED PERFORATING. MACHINE Application November 29, 1941, Serial No. 421,080

23 Claims.

This invention relates to record controlled perforating machines, and more particularly to such machines, which are controlled by individual records bearing magnetic index points representing the desired data.

In the embodiment of the present invention, rotatable, spirally arranged, sensing magnets are provided for successively sensing the columns of magnetic index points, or data representations, on each record, while the latter is at rest. Suitable settable data storing means are provided, which are connected, successively, to common electron discharge amplifying means, the latter being connected, at predetermined times in the sensing cycle, to the sensing magnets, said storing means being controlled in accordance with the data representations sensed on the magnetic record sheet. Upon completion of the sensing operations, means are provided, whereby a suitable statistical machine, such as a card punch unit, is controlled, to effect perforating of the card, step by step, in accordance with the settings of the said data storage means.

An object of the present invention resides in the provision of an improved and simplified record controlled statistical machine, such as a record perforating machine.

Another object of the present invention resides in the provision of an improved statistical machine, such as a statistical card punch, wherein a plurality of positionable or rotatable, and spirally arranged sensing magnets are provided, for sensing successively the columns of data representations, while the record sheet is at rest, for controlling the operations of said machine.

Another object of the present invention resides in the provision of an improved statistical machine, such as a statistical card punch, wherein the said rotatable sensing magnets are connected, successively, into the input circuit of a single or common impulse amplifying means, for controlling the operations of the machine.

Another object of the present invention resides in the provision of an improved statistical machine, such as a statistical card punch, wherein a plurality of groups of data storing means are provided. which storing means are connected, successively, and in synchronism with the operation of the rotatable sensing magnets, to the output circuit of the said impulse amplifying means.

Still another object resides in the provision of an improved statistical machine, such as a statistical card punch, wherein a gaseous discharge device is provided, and connected successively,

15 Other objects of the invention will be pointed V out in the following description and claims and illustrated in the accompanying drawings, which disclose, by way of example, the principle of the invention and the best mode, which has been contemplated, of applying that principle.

In the drawings:

Fig. 1 is a diagrammatic view showing the electrically connected sensing and punching units.

Fig. 2 is a fragmentary view of the magnetic record sheet.

Fig. 3 is a sectional view of the record sheet shown in Fi 2.

Fig. 4 is a table showing the code employed in the present invention.

Fig. 5 is a timing chart of certain control elements of the machine.

Fig. 6 is a plan view of the record sheet sens ing unit.

Fig. 7\is a front elevation view of sensing unit shown in Fig. 6.

Fig. 8 is a sectional view along the lines 8--8 of the sensing unit in Fig. 1.

Fig. 9 is a sectional view along the lines 9-4! of Fig. 6.

Fig. 10 is a sectional view illustrating details of construction of the punch unit.

Fig. 11 is a sectional view, similar to Fig. 10, but taken on a. section line further to the front of the punch unit.

Fig. 12 is an enlarged view illustrating the details of the carriage escapement mechanism of the punch unit. I

Fig. 13 is a View in side elevation of the ejecting mechanism of the punch unit.

Figs. 14 and 14a, taken together, are a circuit diagram of the machine.

the said General description The present machine consists of two units, namely the magnetic record sensing, or reading unit R, and a well known type of statistical card punch P, which are electrically interconnected by a multi-wire cable PRC. The record sheet 20 is provided with a plurality of equally spaced records consisting of coded magnetic index points representing the data recorded thereon. Provision is made, whereby the record sheet 20 is fed intermittently, or step by step, to present the individual records to a suitable sensing position, whereat the records are sensed, while the record sheet 20 is stationary.

A group of spirally arranged sensing magnets 92a92d are provided in a continuously rotating sensing drum 32, which drum is constructed of suitable magnetic material. The said magnets are effective to sense successively the columns of magnetic index points on the individual records, while the latter are at rest, thereby initiating control impulses, at the differential times, the coded index points are sensed in the columns. In practice, the gearing of the sensing drum driving mechanism, and the size of the sensing drum, are arranged so that the linear speed of sensing the magnetic index points is slightly greater than twelve inches per second. The principle of successively sensing the individual columns of the coded'data magnetic representations is preferred, so that a single common impulse electron discharge amplifier unit illl can be used. In the event, concurring sensing of the columns of data representations is desired, individual amplifier units, for each column of data sensed, must be used.

Means, operated in synchronism with the positionable sensing drum, including the spirally arranged sensing magnets, are provided to connect the individual sensing magnets to the input circuit of the said amplifier unit, thereby permitting the differentially timed impulses, initiated by the said sensing magnets, to be impressed upon, and be amplified by, the said amplifier unit; such means, in the instant case, comprise a plurality of individual rotatable elements, or rings 95, of suitable insulating material, each ring being provided with an elongated conducting segments Si, S2, S3, and S4 adapted to cooperate with fixed related conducting members, or brushes 96, at predetermined time intervals, during the sensing cycle. Additional means, such as emitter means E, are provided, which also operate, in synchronism with the said spirally arranged magnets, for connecting successively, individual data storing means, comprising the individual groups of relays RalRal, RbiRb4, Rc|Rcl, and Rdl-Rdl, to the output circuit of a gaseous discharge device Tl, associated with the amplifier unit I10, so as to be selectively controlled, at differential times, by the amplified impulses in accordance with the sensed magnetic index points. The selected relays, of each group, are maintained in an operative condition for controlling subsequently, the operations of the punch unit, immediately upon completion of sensing operations. I

A gaseous discharge device of the Thyratron" type is preferred in the instant embodiment, for it has been found, by experiment, that longer working impulses, which are to be impressed on the connected work circuit, are available by this method, as compared to, the original impulses initiated by the high speed sensing means. Upon completion of the sensing operations, suitable controlling means, such as the emitter controlled contacts ECI and the associated circuits, are called into action to render the punch unit operative. The individual statistical cards, in the punch unit, are perforated, or acted upon, in the difi'ere'nt desired columns, step by step, in accordance with the settings of the operated groups of storing relays. Suitable readout means I65 are provided. in the punch unit, for successively connecting the groups of interconnected contacts, of each group of storage relays to the group of control means, such as magnets III, of the punch unit, whereupon, the said magnets are energized selectively, in accordance with the settings of the contacts of the said groups of relays. Upon completion of the punching operations, means are called into action, under direct control of the punch unit, for electing the punched card, feeding the next card to the punches, feeding the next magnetized record to the sensing unit, and rendering the sensing magnets effective to sense, or analyze, the last mentioned magnetized record for further controlling operations.

Magnetic record sheet Referring now to Figs. 2 and 3, a suitable magnetic record sheet or strip 20 is shown to comprise a paper carrier or base 2| which is coated with magnetizable granular material 22, and a layer of paper 2! suitable for receiving printed impressions covering the said magnetizable material. To this end, suitable metal powder, or filings, may be suspended, or mixed, in any suitable binder, and sprayed, or coated, on one of the plies, or layers, of paper. This binder may contain suitable adhesive material, in order to bond securely the magnetizable material to both plies of paper, and thus form a unitary structure of the three layers of material. If preferred, other types of magnetizable record material can be used, for example, one of the types shown in Figs. 4 through 9 of my U. S. Patent No. 2,254,931.

In Fig. 2, a fragmentary section of the continuous record sheet 20 is shown, and comprises individual records formed thereon, at equally spaced intervals, which are indicated by the reference characters A-C. Each individual record comprises a line of printed data, as indicated by the reference character 24, which printed data correspond to the magnetically recorded data, and a plurality of discrete magnetic index points, indicated by the reference character 25. Obviously, the magnetic impressions on the record sheet are not visually discernible, but are merely indicated, by the shaded areas 25, to show the code positions of, certain of the data representing magnetic impressions. The combinational code employed to represent various data is shown in Fig. 4. The code or index point positions for the available columns on the record sheet are shown by the cross marks in the first individual record A on the sheet. It is to be noted that the printed data 24, of each record, is disposed at a predetermined and fixed location on each record, and that the magnetic index points are disposed in a predetermined and fixed area on each record. The linear relationship between the line of printed data 24 and the magnetic index points 25 is a fixed relationship the purpose of which will be understood as the description progresses. It should be mentioned too, that the usual marginal or feed perforations 26 are provided in the instant record sheet 20.

Sensing unit Record feeding means.Referring now to Figs.

the said one revolution shaft 38.

8 and '7, it is seen that the magnetic record sheet 28 is fed from a supply roll 38 under an idler roller 3|, over a sensing drum 32, under the sprocket feed roller 33 to the take-up roll 34. As mentioned before, sensing operations are effected while the record sheet or strip is stationary. Repeated, or intermittent, feeding operations are effected, in order to present the next individual record formed on the sheet to a suitable sensing position, under control of the punching mechanism, after completion of the record punching operations;

Referring now to Figs. 6-9, the mechanism of the sensing unit R for feeding the said record sheet 28 will be described. Secured to the main shaft 35 of the sensing unit is a drive gear 36 meshing with gear 31 rotatably mounted on a single revolution shaft 38. Shaft 35' is driven by any suitable means, which in the instant case consists of motor 39, gear 48 secured to the motor shaft 4|, which gear meshes with gear 42 secured to the input shaft 43, of a suitable gear reduction unit 44,-the output shaft 45 of the latter being coupled to main shaft 35, by a suitable coupling or connector 45. The main shaft 35 is suitably supported by a main upright panel 41 mounted on a base 48, and an intermediate plate 49 secured to the said panel 41. The said gear reduction unit 44 is supported by a suitable bracket 58, which in turn is secured to the said plate 48. The single or one revolution shaft 38 also is suitably journaled in the said panel 41 and plate 49. i

A clutch element, of a well known type of one revolution clutch unit, such as disc having a single notch 52, is secured to the gear 31, which disc is arranged to cooperate with the pawl 53 pivotally supported by the clutch member 54, which member 54, in turn, is suitably secured to Normally the clutch member 54 and pawl 53 are held in a latched position by a pivoted latch arm 55, the upper extremityof which (as viewed in Fig. 8) is suitably notched to engage the extension fingers usually provided on the clutch member 54 and pawl 53, thereby preventing the tooth 55 of thespring urged pawl 53 from energizing the notch 52 of clutch disc 5|. The lower extremity of latch arm 55 normally is urged against the free end of armature 51 of the clutch magnet 58, by means of spring 55a (one end of which is linked to a camming lever 58 carried by the latch arm thus maintaining the clutch unit in the described latched position. Upon momentary energization of the clutch magnet 58, the s engages the single notch 52 of the rotating disc 5|, thus causing the latter to drive the said pawl 53, clutch member 54 and shaft 38. Upon completion of one revolution of shaft 38, the clutch pawl elements are latched, as shown in Fig. 8, due to the engagement of the cam element 59, secured to gear 31, and the camming lever 68 plvotally mounted on the latch arm 55, thereby causing the latch arm 55 to be reset to the normal position shown, in which position, the upper extremity of said latch arm is effective to prevent the pawl 53 and clutch member 54 from being rotated more than one revolution.

A gear BI is secured to shaft 38, which gear being rotatably mounted on stud shfiftb. Gear 82 also meshes with gear fl -thedatter being fixed to shaft 55. Shaft has amxed ,thereto the said sprocket feed roller 33, ancipulley 88,, which pulley is connected, by a spring belt 81, to pulley 88 secured to the take-up shaft. 85.

Thus, it is seen, by meansof the described gearing, and upon momentary energization ofthe clutch magnet 58, that the shaft 38 is rotated one revolution to effect rotation of the sprocket feed roller 33 and the take-up shaft 69, thereby causing the record sheet 28 to be advanced a predetermined distance. The ratios of the described gearing is such that, for each revolution of shaft 38, the record sheet 28 is advanced a distance D, indicated in Fig. 2, which is equivalent to the distance from one printed line of one record to the printed line of the next adjacent record.

The take-up roll 34 is wound on a suitable reel 18, which reel is detachably mounted on the take-up shaft 59. Similarly, the supply roll 38 is mounted on a suitable reel or spool 1|, as desired, which spool is detachably mounted on a shaft 12. Shaft 12 is provided with suitable braking means to keep the record sheet taut, which are shown to consist of a pulley 13 secured to shaft 12, having a spring belt 14, attached to a suitably fixed bracket 15, looped around said pulley.

Suitable means are also provided for preventing backward rotation of the one revolution shaft 38, at the instant the clutch unit is tripped, which consist of a pair of gears 16 and 11 secured to a stud shaft 18, one of the said gears designated by the reference character 16 meshing with gear 54, and the other gear 11 meshing with a gear 19 rotatably mounted on a stud shaft 88. The said gear 19 carries a ratchet wheel 8|, the teeth of which are engaged by a spring urged, pivotally mounted locking pawl 82, which pawl and ratchet wheel permit rotation of the associated elements in one direction only. A well known expedient is provided for preventing the pawl 82 from riding on the ratchet wheel as the latter is rotated in a forward direction, which comprises a pair of arms, designated 8|a, pivoted to a stud 82a riding in a suitable slot formed in pawl 82. The arms ride in a peripheral groove formed in the ratchet wheel 8|, and have the free ends thereof urged together by spring 82b. Thus, during a forward rotation of ratchet wheel 8!, the arms 8|a are frictionally urged in that direction, causing the pawl 82 to clear the ratchet wheel, however, at any time, the ratchet wheel tends to rotate in the reverse direction, the frictionally driven arms 8|a position the pawl 82 so as to engage immediately the teeth of said ratchet wheel to prevent rotation in the said reverse direction.

Cooperating with the sprocket feed roller 33 is a spring urged pivoted bracket 84 provided with a pair of extension arms 85 adapted to hold the record sheet 28 against the sprocket feed roller 33.

It should also be mentioned, at this time. that a pair of cam elements 86 and 81 are secured to shaft 38, for cooperating with the suitably disposed, normally closed, cam operated contacts CI and C2, respectively (also see Fig. 14a), the purpose of which will be described later.

Record sensing mcans.R.eferring now to Figs. 7 and 9, the means for sensing successively the individual rows or columns of magnetic index points formed on the record sheet 28 will be exmeshes with gear 82, theiast mentioned gear" plained. Suitably secured to one end of the main shaft 35 is an annular flanged head or drum 90, of suitable magnetic material, such as soft iron, which is referred to herein as the sensing drum. A plurality of spirally arranged apertures 9I (four in the instant case) are provided in the drum, which are spaced 90 apart, each aperture being formed at different and equally spaced positions along the transverse axis of the sensing drum. Disposed in each aperture is a sensing or reading magnet 92 provided with a slightly protruding pole-piece 93. The said magnets 92 are positioned in the related apertures so that the corresponding pole-pieces 93 are substantially flush with the outer periphery of the sensing drum 90. It is understood, therefore, that the magnets 92 are spaced 90 apart around the periphery of the sensing drum, and are equally spaced along the transverse axis thereof, so as to correspond to the equal spacing of the columns of magnetic index points on the record sheet 20. Thus, each magnet 92 is arranged to sense a related column of index points, and the magnets, upon rotation of the sensing drum, are eifective to sense the columns of index points successively. For the sake of clarity, the individual sensing magnets are designated 92a-92d in the various figures, including the circuit diagram. And, for the sake of bravity, the said magnets will be referred to herein, as spirally arranged sensing magnets.

The end of the shaft 35, to which the sensin drum 90 is secured, is provided with an axial bore 93, which is arranged to communicate with the individual channels 94. By this provision, the individual electrical conductors which are connected to the coils of the sensing magnets 92a92d are inserted through the said bore and channels, thereby providing suitable electrical connections, from the said magnets, to individual conducting segments SI, S2, S3, and S4. The individual segments are provided in individual insulating rings 95 which are keyed, or secured in any desired manner, to the main shaft 35. The said conducting segments SIS4 are spaced 90 apart, and each are elongated sufficiently, so that the related sensing magnets are con nested in the sensing circuits long enough to sense all the index point positions of the corresponding column (see the timing chart in Fig. 5).

Individual fixed conducting brushes 96 (Figs.

6 and 8) are provided for engaging the conduct ing segments SIS4 as the rings 95 are rotated. The arrangement of the said brushes and conducting segments is such, that, the segment SI engages its related brush, at the time, the magnet 92a traversesthe index point positions of column a (Figs. 2, 5 and 14a), segment S2 engages its related brush, at the time, magnet 92b traverses the index point positions of column b, and so on. A common conducting ring 91 is prov ded, which is engaged by the associated brush 98, the purpose of which will be understood as the description progresses.

Also, secured to the main shaft 35 is a rotary arm 99, of a well known type of impulse distributor or emitter device E (Fig. 9), carrying a pair of electrically connected brushes I00, one of which engages a common conducting ring IOI, as the brushes are rotated, and the other of which traverses the spaced conducting segments I02 which are disposed, in arcuate groups, in the suitably fixed insulating ring I03. In Fig. 14a, these groups of fixed contacts or conducting segments I02 are designated a-d, and each group of se ments will be referred to as I02a, I02b, I020, or-

7 to the left.

I02d, in the description of the circuit diagram. Thesaid groups of individual conducting segments are traversed successively by the related brush I00, and are disposed so that the group I02a are traversed, at the time, the magnet 92a is effective to sense the index point positions of column a, the group I02b are traversed, at the time, the magnet 92b is effective to sense the index point positions of column b, and so on.

Secured to and carried by the said rotary arm 99 is a camming element, such as extension finger I04, which finger, during the rotation of arm 99, engages and effects closure of the fixed and suitably disposed contacts ECI. The arrangement is such, that the said contacts ECI are closed momentarily, during each rotation of the said arm 99, after the magnet 92d traversed the index point positions of column d (see Fig. 5).

Card punch unit Referring now to Figs. 10-13, the controlled card punch unit P will be described. As mentioned hereinabove, the sensing unit is electrically connected with the said punch unit to effect punching of record cards, in predetermined columns, in accordance with the data sensed on the record sheet 20. The punch unit is old and well known in the art, and is usually referred to as a duplicating punch. The following brief and general description is believed suflicient in order to fully comprehend its use in the present invention; however, if a more detailed and complete description of the punch unit per se is desired, reference should be made to U. S. Patent No. 1,976,618 and to the punch at the top of Fig. 1 of U. S. Patent No. 1,962,750.

During the operation of the said punch unit,

va blank statistical card H0 is fed from the bottom of the hopper III by the usual picker knife H2, and is advanced'to the left, as viewed in Fig. 1, to a position where the said card is received by the positionable card carriage I III. The card is then punched, column by column, as desired, and the card carriage moves, step by step, When the punching of the card is completed, and the card carriage has reached the end of its movement, the punched card is automatically removed, and the operation just set forth can be repeated.

The said punch unit can be controlled manually, by depression of the data keys I I4, or automatically, under control of the magnets H5, referred to in the art as duplicating selector magnets. The individual armatures IIIi of the magnets II5 are connected to the related keys IN by individual pivoted links I I1, so that, upon energization of the said selector magnets, the corresponding data keys I I4 are caused to be depressed. Depression of a key II4 actuates an associated bell crank I I8 which, in turn, effects p0- sitioning of a related interposer II9 to the left, as viewed in Fig. 10. Whenever an interposer I I9 is thus positioned, it can be acted upon by a depending member I20 of a depressor plate I2I.

' Upon positioning an interposer II9, to the left,

a common bail I22 is rocked, raising an arm I23, thereby causing contacts PC to be closed.

Closure of the said PC contacts causes energization of the punch magnet I24, whereupon. the armature I25 is swung about its pivot, rocking bell crank I26, through the link I21, and drawing downwardly the link I20, thereby causing the depressor plate I2I to be rocked. Upon rocking of the said depressor plate, the positioned interposer I I9 is depressed, consequently, causing the corresponding punch I30 to be depressed to periorate the card in a corresponding index point position. As the punch passes through the card, and the link I21 moves to the right, the lug I3I pushes the arm I23 to the right (as viewed in Fig. 11) to release and open the said contacts PC, thereby causing the said punch magnets I24 to be deenergized, and permitting the punch and its actuating mechanism to return to the shown normal position.

With each punching operation, the well known escapement mechanism, shown in Fig. 12, is perated to permit the card carriage II3 to be released one step, in order to present the next adjacent column of the card to the punches. Thus, for each punching operation, shaft I32 is rocked in a clockwise direction, and then a counterclockwise direction, to first effect disengagement of pawl I33 from teeth I34, formed on the top side of the card carriage rack I35, by a shaft actuated pin I36, and the engagement of latch pawl I31 with teeth I34. Spring I 38 will then pull pawl I33, to the left, on its loose pivot, to rest on top of a tooth, so that, when the counterclockwise movement of the shaft I32 raises pawl I31, the

advance of the rack I35 and card carriage II3 willbe halted, by pawl I33 engaging the next tooth.

The rocking of the common bail I22 also causes the shaft I39, affixed thereto, to be rocked, as well as the T shaped element I40, consequently, opening contacts FC, each time the card carriage is advanced. The usual skip bar I4I can be provided, for cooperation with the pawl I33, to permit an extended movement of the card carriage, until the next low spot in the skip bar allows the said pawl to be lowered,

Thus, it is seen, that the punches I30 can be operated selectively, under control of the selector magnets II5, to effect punching of the desired data in the card H0, in adjacent columns, step by step, or, to automatically skip predetermined columns of the card, under control of the skip bar MI, and effect punching only in certain predetermined columns.

As mentioned before, provision is also made, for automatically ejecting the punched card, after the card is positioned to the last column position, and returning the card carriage to pick up another card, from the picker, for subsequent punching operations. After the positioning of the last column of the card to the punching position, the last column contacts LC are closed, by means of bracket I42 secured to rack I35. It will be explained later, how the closure of contacts LC effects energization of'the ejector magnet I43. Upon energization of magnet I43, the associated armature I44 is partially rotated, in a clockwise direction, to actuate the associated mechanism to release latch I45. This permits spring I46 to move rack I41 to the right, as viewed in Fig. 13, and gears I48 to actuate the gripper jaws I43 and I50, thereby raising the card just punched, and depositing it upon the stack I I. Return of the said jaws is accomplished, by movement of the rack I41. to the left, by the end of rack I52 (Fig. 11), during the return of the card carriage, which will be described presently. It should be mentioned, at this time, that suitably disposed auto-start control contacts AC (see Fig. 14) are provided, so that these contacts are closed by the rack I41, when the latter is positioned to the right, as viewed in Fig. 13 (these contacts are designated 20I in the said Patent No. 1,976,618)

It will be shown later, that closure of contacts AC causes the clutch trip magnet I53 to be energized. Referring now to Figs. 10 and 11, upon energization of the said magnet I53, armature I54 is partially rotated, in a clockwise direction, to cause the attached arm I55 to depress block I56 under the shoulder of latch I51, thereby causing the contacts CTI to be held open, and contacts GT2 closed. It will be shown. that closure of contacts,CT2, causes the carriage return motor M to be energized 'and, in turn, causing the shaft I58 to be rotated,

Another arm I59, attached to said armature I54, is depressed to cause the pawl I60 to engage one of the teeth of ratchet I6I, the latter being secured to shaft I58. The pawl I60 is pivotally carried by disk I62, which disk, in turn, is secured to gear I63, so that gear I63 is set into rotation, whenever the clutch mechanism is tripped, as described. Since gear I63 is in engagement with .he lower set of teeth of rack I52, the said rack I52 and card carriage II3 are returned to the right, as viewed in Fig. 1, upon rotation of gear I63, to receive another card from the said picker II2.

A fixed camming bracket I64 is provided to engage the free end of pawl I60, during its rotation, thereby disengaging the said pawl and ratchet, upon one revolution of shaft I58. Provision is also made to release the latch I51, at this time, to restore the said contacts CTI and GT2 to the normal positions shown in Figs. 10 and 14.

The usual magazine card lever contacts MC (Fig. 14) are provided in association with the hopper I I I, and are arranged to be closed as long as cards remain in the said hopper. The suitably diposed contacts RC (Fig. 14) are also provided, and as known are arranged to be closed, by the usual card lever, so long as a card is presented in the punching position by the card carriage.

It should be mentioned too, that the known read-out contact strip I65 (Figs. 1 and 14) is employed, which comprises a common conducting strip I 66, and a plurality of spaced conducting segments I61, the said strip and segments being suitably mounted on, and insulated from, the frame of the punch unit. The said conducting segments are spaced parallel to the line of motion of the card carriage. A plurality of interconnected brushes I68 are carried by, and insulated from, the card carriage, and are arranged so that the conducting segments I61 are connected successively to the common conducting strip I65, as the card carriage moves along, step by step. A similar read-out strip is shown in U. S. Patent No. 2,209,107.

Operation terminals of the sensing magnets 92a, 92b, 92c, and 92d, are connected to the individual rings 95, carrying the conducting segments SI, S2, S3, and S4, respectively. The brushes 96, of the said rings 95, are connected, by a common circuit, to

the said input circuit of the amplifier unit. The output circuit of the amplifier unit is suitably connected to a grid element of a mseous discharge device TI, which is oi. the Thyratron type. By this, it is meant, that, upon rendering the device TI conductive, the grid element exercises no further control over the said device. The said grid element, of device TI, is biased negatively, by any suitable means, such as the battery, indicated by the reference character I1 I, whereby the device is normally maintained nonconductive.

The principle of magnetically sensing discrete magnetic impressions is well known, and is explained in detail in my said Patent No. 2,254,931. Upon suflicient relative movement between the magnetic record sheet and the sensing magnets, the remanent flux of each discrete magnetic impression, or index point, on the record sheet causes an E. M. F. to be generated in the coil of each sensing magnet, which E. M. F. is, in turn, impressed upon the input circuit of the amplifier unit I10, to render the latter conductive, at such times. At all other times, the amplifier unit is arranged to be substantially non-conductive. Since the output circuit of the amplifier unit is connected to the grid element of the gaseous discharge device Il, the said device is rendered conductive, each time the amplifier unit is influenced, by the sensed magnetic index points, and rendered conductive. As is known, the grid element or device TI, can then, no longer, exercise any control over the device. In the instant case, the grid element is permitted to regain control of the device, by opening the output circuit of the latter, at a predetermined time interval, after the device TI is rendered conductive. By this arrangement, the original potential impulses initiated by the sensing magnets Ma -92d, and impressed upon the amplifier unit, are lengthened by the action of the said gaseous discharge device, and thus, making available a greater amount of power, which is impressed upon the connected work circuits.

It is noted, that the output circuit of the gaseous discharge device TI is connected to the rotatable brush I08 of the emitter E, the fixed groups of contacts I02a-III2d, of which, are connected to a plurality, or group, of storing means or devices. Each storing means includes a plurality of relays, such as relays RaI-Ra4, Roi- R294, Rel-RC4, and RdI-Rd4. The contacts of each group of mentioned relays are interconnected, in a similar and well known manner, so that, upon selective operation of one, or more, relays of each group, a single circuit is selected from a group of circuits, in accordance with the settings of the said relays, the purposes of which will be understood as the description progresses.

Now, let us assume, that blank cards are properly placed in the hopper I I I of the punch, so that contacts MC are closed; that the card carriage H3 is positioned in the last column position, so that contacts LC are closed; that the record sheet 28 is properly positioned in the sensing unit, and in this connection, it should be stated, that an indicator or pointer I12 (Fig. 6) is provided, and located above the sensing drum, which pointer serves as a guide for proper insertion of the record sheet. The first printed line 24, on the sheet 20, should be placed opposite the said pointer, thus assuring the fact, that the record is properly positioned for initial operation of the unit, and that the record will be positioned properly, step by is further assumed, that the switches I15- -I11 are closed, to energize the motor 38 of the sensing unit, to impress the proper potentials upon the amplifier unit, and to establish the following circuits.

One of these circuits can be traced from the negative terminal of switch I15 to binding post I, of a suitable terminal strip, switch I18, common conductor I18, conductor I18, coil of relay R1, contacts LC, and conductor I8II, switch I15, binding post 2 to the positive terminal of switch I15, energizing said relay. Upon energization of the said relay, contacts R1a and R1!) are closed. Closure of contacts R10. establishes a circuit from conductor I88 to contacts CTI, conductor III, contacts R10, eject magnet I43, conductors I82 and I83 to conductor I18, energizing the said eject magnet. The energization of the elect magnet .causes the gripper jaws to rotate, as described hereinabove, and consequently, causing the autostart contacts AC to be closed. A circuit is then step, during subsequent operations of the unit. It 7 5 completed from the positive terminal of the power supply by conductor I" to contacts R1b (now closed), contacts AC, binding posts 5 and 3, contacts MC, binding post 4, conductor I84, pick-up coil of relay R5, conductor I to the negative terminal of the said power supply, energizing the said relay. A holding circuit is established for this relay, through contacts R50, which is as follows: positive terminal of the power supply, conductor I86, normally closed cam contacts CI, conductor I81, contacts R5a, holding coil of relay R5, to conductor I85 and negative terminal of the said power supply.

Another circuit extending from binding post 4 can be traced as follows: binding posts 4 and 5, conductor I88, normally closed contacts Ric, conductor I88, the clutch trip magnet I53 to conductor I18, which circuit is established, upon closure of the aforementioned operated contacts AC, to energize the said trip magnet 53. Energization of magnet I53 causes the contacts CTI to be opened, and contacts GT2 to be closed. Opening of contacts CTI breaks the circuit to the eject magnet I43, and closure of contacts CTI completes a circuit from the said power supply through the punch motor M, by connecting the latter to conductors I18 and I80.

It is remembered, upon operation of the punch motor, the card carriage is returned to receive a card from the picker, and position it, to the first column or punching position, consequently, causing the last column contacts LC to be opened, which in turn, cause relay R1 to be deenergized. In this manner, contacts R10 and R11) are restored to the normally open positions.

Relay R5 being energized, a circuit is completed from the power supply to the clutch magnet 58, of the sensing unit, by means of the closed contacts R5b. Energization of this clutch magnet causes the one revolution shaft 38 to be rotated, and immediately causing cam contacts CI and C2 to open. Opening of the said contacts CI breaks the described holding circuit for relay R5, the deenergization of which, disconnects the said clutch magnet 58 from the power supply, thereby permitting the said shaft 38 to be latched, as described hereinabove, upon the completion of one revolution. Opening of the said contacts C2 disconnects the connection between the gaseous discharge device TI and the emitter E, associated with the said groups of storage relays, while the record sheet 28 is fed, thereby preventing the completion of any false circuits from the sensing magnets to the storage relays.

Rotation of the one revolution shaft 38 causes the record sheet 20 to be advanced, so that the first individual record formed thereon is moved to the sensing position, whereat, the said record sheet is held stationary during the sensing operations. Thus, it is seen, that upon completion of the single revolution of shaft 38, the first record of the magnetic sheet is positioned, so that the columns of magnetic index points, representing the desired data formed thereon, can

be sensed, successively, by the magnets 92a--92d, while the record is stationary; and that the first blank card IIO, picked up from the hopper III is placed in position to be punched. It is remembered that, upon energization of the sensing unit motor 39, the sensing drum is rotated continuously. Thus, during the revolution of the sensing drum, immediately following the one, during which latching of the one revolution shaft 38 occurs, sensing operations are effected. The timed intervals, during the said revolution of the sensing drum, during which the successive sensing of the different columns occurs, are indicated in the timing chart (Fig. 4), namely, by the timing of the emitter E, and the conducting segments SI-St. During this revolution of the sensing drum, in which sensing takes place (and which will be referred to as a sensing cycle), the contacts CI' and C2 are closed, as indicated in the timing chart.

The magnet 92a is presented first to its related column of magnetic index points, which as mentioned hereinabove, is the column a, indicated on the record sheet 20 (Fig. 2). After the magnet 92a completes sensing the said index points, magnet 82b senses the adjacent column of index points, namely, column b; after column b is sensed, magnet 92c senses the index points in column 0, and finally, after the sensing of column c, magnet 92d is effective to sense the index points in column d.

The rings 95, carrying conducting segments SIS4, and the brushes I00, of the emitter E, are operated in timed relation, or synchronism, with the movement of the sensing magnets, so that, the said segments are connected in the input circuit of the common amplifier unit, at the.

times the related magnets 92a-92d, respectively, are effective to sense the index points in the corresponding columns a-d. Also, the individual groups of fixed contacts of the emitter E are traversed, successively, by the brushes I00, and connected in the output circuit of the gaseous discharge device TI, at the times, the related sensing magnets 92w-92d, respectively, are effective to sense the corresponding index point positions. By virtue of the described synchronous operations, the groups of storing relays, RaI-Rat, RbI-Rbt, Rcl-Rc4, and RdI -Rd4, are influenced, successively, in accordance with the disposition of the coded magnetic index points.

Assume now, that the first record, indicated by the reference character A in Fig. 2, is held, at rest, in the sensing position, and that magnet 82a is rotated past the first column (a) of index points. It should be mentioned, that the sensing magnets are rotated in a direction, so that the last index point positions are sensed first, i. e. with reference to Fig. 2, the index point positions are sensed in 4-3--2-1 order.

Upon sensing a magnetic representation, at the 3" index point position, the E. M. F. induced in magnet 92a is impressed upon the input circuit, of the amplifier unit I10, to render this unit conductive, thereby rendering the gaseous discharge device TI conductive. A circuit is then completed from the negative terminal of switch I15 to conductors I85, I90, cathode and anode elements of device TI, contacts RBd, cam contacts C2, brush I00, the second traversed segment of group l02a, conductor I9I, coil of relay Rai, coil of relay Ra, cam contacts CI and conductor I06 to the positive terminal of switch I15, energizing said relays Rail and Ra. A holding circuit is established immediately, and can be traced as follows: negative terminal of the power supply connected to conductor I85, conductors I90 and I92, resistor I93, contacts Ra3a, coil of relay Ral, coil of relay Ra, cam contacts CI, and conductor I connected to the positive terminal of the said power supply. This holding circuit is maintained, as described, until the cam contacts CI are opened, during the next record sheet feeding cycle. The said gaseous discharge device TI is rendered non-conductive, as the emitter punch I00 leaves the said segment, of the group I02a, connected to the conductor I9I.

As the magnet 92a is rotated past the index point position 1 of column a, the magnetic impression is effective to induce an E. M. F. in the said magnet, rendering the amplifier unit- I10, and the gaseous discharge device TI, conductive again. A circuit is now completed from conductor I to conductor I90, cathode and anode elements of device TI, contacts Rid, cam con tacts C2, brush I00, the last segment traversed in the group I02a, conductor I94, coil of relay RaI, coil of relay Ra, cam contacts CI to conductor I86, energizing relay RaI. A holding circult is established for this relay, and can be traced from conductor I85 to conductor I90, resistor I85, contacts Rala, coil of relays RaI and Ra, cam contacts CI to conductor I80.

In this manner, the plurality of relays, of each data storing means, are selectively operated, or conditioned, by the differentially timed impulses initiated under the control of the said sensing magnets, in accordance with the disposition of the sensed magnetic index points, which selections are maintained until all the columns of index points, on an individual record, are successively sensed, and the corresponding data successively entered on the record card by the punch unit.

Immediately, after the sensing of the first column of index points by magnet 92a, the second column is sensed by magnet 92b to control selectively the operation of the relays of the second storing means, namely, relays RbI--Rbi. According to the specific example under consideration, a magnetic index point is sensed at the 3 index point position by magnet 92b (see Fig. 2). Due to the synchronous operations of the conductive segment S2 and emitter E, relays Rb! and Rb, of the said second storing means, are energized, precisely, in the same manner, as described in detail hereinabove. For this reason, it is believed, that further detailed description for the following sensing operations are not necessary, A holding circuit is established for these relays through the contacts Rb3a, which circuit is maintained, until cam contacts CI are opened.

Similarly, magnet 92c is effective to cause relays Rcl and R0, of the third storing means, to be selected and energized, which selection is maintained by the holding circuit established through cam contacts CI; and finally, magnet 92d is effective to select and effect energization of relays RdI and Rd, of the fourth storing means, which selection is likewise maintained, so long as cam contacts CI remain closed.

Now, immediately following the sensing of the fourth, and, in the present example, the last column of index points, and before repeated sensing operations are effected, contacts ECI, associated with emitter E, are closed to establish a circuit from conductor I86, through contacts Rda, Rca, Rba, Raa, said contacts ECI, coil of.

relay R6, and conductors I86 and I85, energizing said relay. A holding circuit is immediately completed from conductors I85 and I86 to coil of relay R6 contacts R6a, conductor I81, cam contacts CI, and conductor I86, which circuit is maintained, until the said cam contacts are opened. Operation of relay R6 immediately renders the punch unit effective to punch the data, stored in the selected storage relays, successively, in desired columns on the card in the punch unit.

Due to closure of contacts R612, a circuit is completed from the positive terminal of the power supply to conductor I88, contacts CTI, the parallel circuit including closed contacts RC and R812 (contacts RC are closed whenever a card in the punch is in punching position), contacts FC, conductor I91, binding post 1, said contacts R6b, binding post 8, conductor I98, common conductin strip I66 of the punch readout strip I65, brushes I68, one of the conducting segments I61 corresponding to the card carriage position, conductors I88 and 288, contacts Rd4c, Rdic, Rd2c, and Rdih, conductor 28I, binding post 9, conductor 282, the duplicating magnet II5 of the punch unit, and conductors I83 and I18 to the negative terminal of the said power supply, energizing said magnet I I5.

It is recalled, upon energization of magnet H5, the associated interposer is moved, closing the punch magnet contacts PC, to effect energization of the punch magnet I24. This causes the selected punch to be'driven through the card, and consequently, the contacts FC and PC are opened to .break the circuits through the said selected magnet I I5, and punch I24, respectively. After the punching operation is completed, the card carriage is permitted to advance one step, pre senting the next adjacent column of the card to the punches, or a predetermined number of steps,

. in the event a skip bar is used. The brushes I68, of the readout strip I65, are advanced accordingly, to establish the next circuit through the third group of storage relays for another punching operation.

This circuit, just referred to, can be traced as follows: conductor I88, contacts CTI, parallel connected contacts RC and R8a, contacts FC, conductor I81, binding post 1, contacts R617, binding post 8, conductor I98, common conducting strip I66, brushes I68, one of the segments I61, conductors 283 and 284, contacts Rc4b, Rcie, Belle, and RcIe, conductor 285, binding post I8, conductor 286, the l duplicating magnet H5, and conductors I83 and I18, energizing said selected magnet I I5. Punching of this data in the card is effected, and the card carriage again is advanced to the next desired column position, as Well as the readout brushes I68.

The said readout brushes I68 are then effective to complete a circuit to conductors 281 and 288, contacts R1140, R1131), Rb2g and Rblg, conductor 289, binding post II, and conductor 2I8 to the 2" duplicating magnet II5, energizing the said selected magnet, and causing the selected data to be punched in the card, and another column of the card to be presented to the punches.

Bushes I 68 are effective again to complete a circuit to conductors 2H and 2I2, contacts Ra4c, Raiib, RaZg, and Ralf, conductor 2I3, binding post I4, and conductor I24 to the 4" duplicating magnet H5, energizing said selected magnet, and causing the selected data to be punched in the card, and the card carriage to be skipped, by means of a skip bar, to the last column position (assuming that the card carriage is not in the last column position when this data is punched). The last column contacts LC are now closed to effect energization of relay R1, thereby causing contacts R1a and R117 to be closed. The eject mechanism is rendered operative, as described hereinabove, upon energization of relay R1, to eject the card just punched, and cause another card to be picked up by the card carriage, and another individual record, on the magnetic record sheet 28, to be presented to the sensing magnets 2a-92d, which magnets again become effective to control selectively the said storage relays, and

cause the record card to be punched accordingly.

If, for any reason, it is desired to feed the magnetic record sheet 28 through the sensing unit, under manual control, a record feed switch 2I5 is provided. Closure of the associated contacts 2I6 causes the relay R5 to be energized, which, in turn, causes the clutch magnet 58 to be ener gized, thereby rendering the record sheet feed means operative.

While there has been shown and described and pointed out the fundamental novel features of the invention as applied to a single modification it will be understood that various omissions and substitutions and changes in the form and details of the device illustrated and in its operation may be made by those skilled in the art, without departing from the spirit of the invention. It is the intention, therefore, to be limited only as indicated by the scope of the following claims.

What is claimed is:

1. A perforating machine controlled by a record sheet comprising a plurality of magnetized records having columns of discrete magnetic index points, said magnetic index points representing the values of the data by their code positions in the said columns, comprising means for feeding the record sheet, step by step, thereby successively presenting the magnetized records to a sensing position and holding each record, at rest, during the sensing operations, positionable sensing means, including a plurality of sensing magnets, for successively sensing the columns of magnetic index points and initiating control impulses, at the differential times at which the index points are sensed in the said columns, a plurality of settable data storing means, one for each column of index points sensed, a common impulse,amplifying means having an input and output circuit, means, operated in timed relationship with the said sensing means, for successively connecting the said sensing magnets in the said input circuit, thereby permitting the differentially timed impulses, initiated by the said sensing magnets, to be impressed upon, and amplified by, the said amplifying means, additional means, operated in timed relationship with the said sensing means, for successively connecting each said storing means in the said output circuit, whereby the said amplified impulses are impressed upon the connected storing means, at different times, for selectively controlling the settings of the latter, in accordance with the data sensed inthe related columns, statistical card perforating means for effecting perforating of individual cards, column by column,'having a group of control magnets, means controlled by the said storing means for selecting certain magnets of the said group in'accordance with the settings of the said storing means, and means for successively energizing the said selected magnets of the said perforating means, thereby causing statistical cards to be perforated, in desired columns, in accordance with the data sensed, on the said record sheet.

2. A perforating machine in accordance with claim 1, characterized by the fact, that the said positionable sensing means comprises rotatable sensing means having a plurality of spirally arranged magnets.

3. A perforating machine in accordance with claim 1, wherein in the said positionable sensing means comprises a rotatable drum of magnetizable material, said drum being provided with spirally arranged apertures, which apertures are formed in the drum at equally spaced, predetermined distances around the periphery of the drum, and at equally spaced, predetermined distances across the periphery of the said drum, and individual magnets, having slightly protruding pole-pieces, disposed in the said apertures, and arranged whereby the said pole-pieces are substantiailly flush with the periphery of the said drum.

4. A perforating machine in accordance with claim 1, wherein the first mentioned means, operated in timed relationship with the sensing means, comprises rotatable elements, of insulating material, having individual elongated con ducting segments, and fixed related conducting members for engaging the said segments.

5. A perforating machine in accordance with claim 1, wherein each said settable data storing means comprises a group of individual storage relays, the said relays being provided with a pinrality of interconnected circuit switching means, which relays, of each storing means, are selectively conditioned by the said amplified impulses impressed thereupon, thereby causing the inter connected switching means to be controlled accordingly for effecting the selection of the said magnets of the perforating machine.

6. A perforating machine in accordance with claim 1, characterized by the fact, that each said settable datastoring means comprises a group of individual storage relays, and that the said additional means, operated in timed relationship with the sensing means, comprises emitter means having a plurality of groups of conducting segments, one group for each storing means, each group having a conducting segment for each relay in the related group of relays-and rotatable conducting means, included in the said emitter means, for successively engagingthe said conducting segments, and connectingthe said output circuit successively to the individualrelays of each group, thereby effecting energization of certain ones of. the relays, ofeach groupgby the amplified impulses impressed thereupon! I 7. A perforating machine in accordance'with claim 1, characterized by the fact, that the said output circuit of the amplifying means includes a gaseous discharge device,;havinga grid element for rendering the device conductive, uponinitiation of the said amplified impulses and'thereafter being ineffective for further controlling the conductivity of the device, said device being controlled, by the said additional means, operated in timed relationship with the sensing means, for rendering the device non-conductive.

8. A perforating machine in accordance with claim 1, wherein means are provided to be con trolled, by the said additional means. operated in timed relationship with the sensing means, for rendering the said magnet connecting means effective, upon completion of the sensing operations.

9. A perforating machine in accordance with claim 1, wherein means are provided to be jointly controlled, by the said additional means, operated in timed relationship with the sensing means, and by the said storing means, for rendering the said magnet connecting means effective, upon completion of the sensing operations.

10. A perforating machine in accordance with claim 1, wherein means are provided to be controlled, by the said perforating means, upon completion of the perforating operations, for rendering the said record sheet feeding means operative, whereby the next magnetized record formed thereon is fed to the sensing position.

11. A perforating machine in accordance with claim 1, wherein means are provided for rendering the said record sheet feeding means operative to feed the next'magnetized record to the sensing position, upon completion of the perforating operations, and means, cooperating with the said feeding. means, for opening the said output circuit of the amplifying means, during the said sheet feeding operation.

12. A perforating machine in accordance with claim 1, wherein each said settable data storing means comprises a group of individual relays which relays are selectively rendered operative by the differentially timed impulses, each relay being provided with means for maintaining the selected relays operative during perforating operations, and means, cooperating with the said feeding means, for rendering the said maintaining means ineffective, upon the completion of the perforating operations.

13. A machine of the class described controlled bymagnetized records having columns of discrete magnetic index points, said magnetic index points representing the values of the data by their code positions in the said columns, comprising posi- .tionable means for successively sensing the columns of index points on the individual records, while the latter are stationary, said sensing means including a plurality of sensing magnets for initiating control impulses, at the differential times at which the index points are sensed in the said columns, a plurality of settable data storing means, one for each column of index points sensed; a common impulse amplifying means having an input and output circuit, means, operated in timed relationship with the said sensing means, for successively connecting the sensing 'magnets in the said input circuit, thereby permitting the said differentially timed control impulses to be impressed upon, and amplified by, the said amplifying means, additional means, operated in timed relationship with the said sensing means, for successively connecting each said storing means in the said output circuit, whereby the said. amplified-impulses are impressed upon the connecting storing means for selectively controlling the settings of the latter in accordance with the data'sensed-in the related columns, a group of Work circuits, means controlled by each said storing 'means for selecting certain circuits of p the group, in accordance with the settings of the said-storing means, and means for successively effecting energization of the said selected circuits.

14. A machine oi the class described controlled by magnetized records having columns of discrete magnetic index points, said magnetic index points representing the values 0! the data by their code positions in the said columns, comprising positionable means ior successively sensing the columns or index points on the individual records, while the latter are stationary, said sensing means including a plurality of sensing magnets for initiating control impulses, at the differential times at which the index points are sensed in the said columns, a plurality of settable data storing means, one for each column of index points sensed, a common impulse amplifying means having an input and output circuit, means, operated in timed relationship with the said sensing means, for successively connecting the sensing magnets in the said input circuit, thereby permitting the said differentially timed control impulses to be impressed upon, and amplified by, the said amplifying means, additional means, operated in timed relationship with the said sensing means, for successively connecting each said storing means in the said output circuit, whereby the said amplified impulses are impressed upon the connected storing mean for selectively controlling the settings oi the latter, in accordance with the data sensed in the related columns, a group of control means, and means for successively rendering each said storing means eflfective to influence certain of the control means of the said group, in accordance with the settings of the said storing means.

15. A machine of the class described controlled by magnetized records having columns of discrete magnetic index points, said magnetic index points representing the values of the data by their code positions in the said columns, comprising positionable means for successively sensing the columns of index points on the individual records, while the latter are stationary, said sensing means including a plurality of sensing magnets for initiating control impulses, at the differential times at which the index points are sensed in the said columns, a plurality of settable data storing means, meansoperated in timed relationship with the said sensing means, ior'selectively impressing the said impulses upon the said storing means, and selectively controlling the settings of the latter, a group of control means, and means for selectively controlling the operations of the control means, of the said group, in accordance with the settings of the data storing means.

16. A machine of the class described controlled by magnetized records having columns of discrete magnetic index points, said magnetic index points representing the values of the data by their code positions in the said columns, comprising positionable means for successively sensing the columns of index points on the individual records, while the latter are stationary, said sensing means including a plurality of sensing magnets for initiating control impulses, at the differential times at which the index points are sensed in the said columns, a plurality of work circuits, and means, operated in timed relationship with the sensing means, for selectively impressing the said impulses upon certain of the circuits of the said plurality.

17. A machine of the class described controlled by magnetized records having a plurality of coded magnetic index points comprising positionable means for sensing the said plurality of coded trol impulses, at the times at which the index points are sensed, a plurality oi work circuits. and means, cooperating with the said sensing means, for selectively impressing the said impulses upon certain of the circuits of the said plurality.

18. A machine of the class described controlled by magnetized records having columns of discrete magnetic index points, said magnetic index points representing the values of the data by their code positions in the said columns, comprising positionable means i'or successively sensing the columns oi index points on the individual records, while the latter are stationary, said sensing means including a plurality of sensing magnets for initiating control impulses, at the differential times at which the index points are sensed in the said columns, a common electron discharge means having an input and output circuit, means for successively connecting the said sensing magnets in the said input circuit, thereby permitting the said differentially timed control impulses to be impressed upon the said discharge means, and render the latter conductive at such times, a plurality of work circuits, and means, operated in timed relationship with the said connecting means, for selectively connecting the output circuit of the conductive discharge means to certain oi the circuits of the said plurality, thereby influencing the said circuits at such times.

19. A machine of the class described controlled by magnetized records having columns of discrete magnetic index points, said magnetic index magnetic index points on a record, while the points representing the values of the data by their code positions in the said columns, comprising positionable means for successively sensing the columns of index points on the individual records, while the latter are stationary, said sensing means including a plurality of sensing magnets ior initiating control impulses, at the diflerential times at which the index points are sensed in the said columns, a common gaseous discharge device having a grid element and output circuit, said grid element capable of rendering the device conductive, and thereafter ineilective for further controlling the conductivity of the device, control means for successively impressing the initiated control impulses upon the said grid element for rendering the device conductive, a plurality of work circuits, and means, operated in timed relationship with the said control means, for selectively connecting the output circuit of the conductive discharge means to certain of the circuits of the said plurality, thereby energizing the said circuits at such times, said connecting means being arranged for rendering the said discharge means non-conductive, after the said circuits are energized for predetermined timed intervals.

20. A machine of the class described controlled by magnetized records having columns of discrete magnetic index points, said magnetic index points representing the values of the data by their code positions in the said columns, comprising rotatable means for successively sensing the columns of index points on the individual records, while the latter are stationary, said sensing means including a plurality of spirally arranged sensing magnets for initiating control impulses, at the diilerential times at which the index points are sensed in the said columns, a common electron discharge means having an 

